Unit on

matter

Chapter 3, Lesson 1

& 2 Vocabulary

MATTER

Anything that has mass and

takes up space.

An example would be:

ANYTHING IN THIS

WORLD!

What is matter?

ATOM The smallest possible particle of

matter. It is smaller than a piece of dust!

You can only see it with a very, very powerful microscope.

EVERYTHING is made of atoms!

MOLECULE

Two or more atoms joined

together.

Two hydrogen atoms and an

oxygen atom join together to

form a water molecule.

MASS How much matter in an object. The

amount of mass in an object ALWAYS

stays the same.

It is constant! You will be the same

mass on the beach, and in space, and

in the mountains, and in Canada!

VOLUME The amount of space an object takes up.

The bigger the object, the more space it

takes up!

Which soccer ball takes up the most

volume?

CHANGE OF STATE

A substance changes from

one state to another--like

from freezing to melting.

SOLID

The molecules in this state

move very slowly. They are

NOT excited! Molecules are tightly packed in a solid.

They hold their shape.

Solids

LIQUID

The molecules in this state

move not too fast and not

too slowly. They move “Just

Right!”

Liquids can change their shape to the

container that they pour into.

Liquids

GAS

The molecules in this state

move very fast. They are

super excited!

Gases take the shape of wherever they are.

Gases

MIXTURE

Two or more substances

combined without being

changed in any way. They

can be separated again.

Example: a salad